Lock.



L. EVANS.

LOCK.

APPLICATION man NOV. 10, 1914.

Patented Mai. 28, 1916. I 3 SHEETS-SHEET 1.

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V L. EVANS.

LOCK.

APPLICATION FILED NOV. 10. I914.

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Patented Mar. 28,4916.

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=1 Ill L. EVANS.

LOCK.

, APPLICATION FILED 'NOV. 10. 1914'- 1,1'77,5O1.

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Patented Man 28, 1916.

LORENZO EVANS, 0F CHARITON, IOWA.

LOCK.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed November 10, 1914. Serial No. 871,355.

To all whom it may concern:

Be it known that I, LORENZO EVANS, a citizen of the United States,residing at Chariton, in the county of Lucas and State of Iowa, haveinvented new and useful Improvements in Locks, of which the following isa specification.

The present invention relates to improvements in locks.

In carrying out my invention it is my pur pose to produce a lockcomprising few parts and wherein the employment of springs is entirelyobviated.

It is also my aim to construct a lock wherein the bolt is shot by aweighted memher and to provide mechanism which acts upon said weightedmember to slide the bolt to an unlocking position.

It is a still further object of the invention to produce a lock havingits bolt normally projected by a weighted member, and means foractuating the said weighted member, a slidable tumbler being arrangedwithin the path of contact with the rear of-the bolt, a weighted detentcooperating with the tumbler to prevent the movement thereof, and meansbeing provided for actuating the detent to bring the same out ofengagement with the tumbler and to slide the said tumbler to permit ofthe actuation of the locking View of a lock constructed in accordancewith the present invention, Fig. 2 is a side view of the same, Fig. 3 isan elevation with the back plate of the lock casing removed, the tumblerhaving been moved to permit of the sliding of the bolt to an unlockingposition, Fig. 4 is a similar view but showing the tumbler moved intocontact with the bolt and locked in such position, the key hole orcurtain plate covering the key hole so that the bolt and detent may beactuated only from one side of the lock, Fig. 5 is a similar view butshowing the curtain plate moved away from the key hole to permit of theinsertion of a key and the actuation of the tumbler from the second sideof the lock,

ing member or lever.

Fig. 6 is a sectional view on the line a-a of Fig. 2, Fig. 7 is asectional view on the line bb of Fig. 2, Fig. 8 is a sectional view onthe line 00 of Fig. 2, Fig. 9 is a sectional view on the line (Z(Z ofFig. 2, Fig. 10 is a perspective view of the bolt, Fig. 11 is a similarview of the bolt projecting lever, Fig. 12 is a similar view of the boltlocking member or tumbler, Fig. 13 is a perspective view of the detentfor the tumbler, Fig. 14 is a perspective view of the knob shaft, Fig.15 is a similar view of the combined tumbler actuating member and keyhole shield or curtain which is operated from the interior of the houseto which the lock is attached.

Referring now to the drawings in detail, the numeral 1 designates thelock casing which is of the usual hollow rectangular construction, andwhich is provided with an outer side plate 2 and an inner side plate 3.If desired, one of the said plates may be integrally formed with thecasing.

The numeral 4 designates the locking bolt which is mounted in suitablebearings 5 in suitable opening in the face plate of the casing. The bolt4 adjacent its inner end is provided with a slot 6 which preferablyextends all the way through the said bolt, so that the same may bewithdrawn and reversed, for a purpose which will be readily understood.

The numeral 7 designates the bolt project- This member includes avertically disposed arm 8, which has its end arranged within the slot 6of the bolt, a

horizontallydisposed arm 9 which has its extremity weighted, as at 10.

The numeral 11 designates a pin which passes through a suitable openingat, the juncture of the arms 8 and 9 of the members 7 and is receivedwithin a suitable boss in the plate 2.

By an arrangement as above described, it will be noted that the weightedend 10 of the substantially L-shaped operating lever 7 will swing thesaid lever upon the pivot pin 11, causing the end of its arm 8 tocontact with one of the end walls provided by the slot .6 and so projectthe bolt through the casing. The L-shaped operating lever 7 hasits arm9, approximately centrally provided with a round boss 12.

The plates 2' and 3 are provided with alining openings for the receptionof the opposite ends of a shaft 13, the ends of the...

the casing 1 and which projects through a shaft projecting through theopenings being provided with suitable knobs l4 and 15, and the shaft 13is centrally provided with a lateral portion 16 which is disposeddirectly beneath or in contact with the round boss 12 of the boltprojecting lever 7. It will be understood that when either-of the knobsH or 15 are turned the lateral member 16 will act upon the boss 12,swinging the weighted' end 10 of the throw lever 7 upward of thecasingl, and consequently drawing the bolt 1 to within the casing. Vhenpressure upon the knob is released, the weighted member 10 will returnthe lever 7 to its initial position and the bolt will again be projectedthrough the open ing in the face of the casing 1, while the lateral orswinging member 16 of the shaft 13 will be returned to its initialhorizontal position.

It is, of course, obvious that some means must be employed for retainingthe bolt in its locking position, and to provide for this I employ adogging bolt 17 which is loosely mounted in suitable bearings 18 and 19.

The dogging bolt 17 comprises a substan tially rectangular member and isprovided upon its underface with a notched lug 20, the said lug, whenthe tumbler is in contacting engagement with the inner end of the boltLbeing arranged directly above the key hole slot 21 formed in the outervplate 2. The bolt 17 is provided upon its underface with a secondtransverse notched lug 22, the same being suitably spaced from the notch20. The dogging bolt 17 upon its upper face is provided with a pair oftransverse slots which are indicated by the numerals 23 and 24respectively, and the numeral 25 designates a weighted detent which hasits tongue received within the slot 24 when the tumbler is in contactingengagement with the locking bolt 4 and in the slot 23 when the doggingbolt is moved away from the sliding bolt. The detent 25 has securedthereto a longitudinally extending arm 26, the same being pivoted to theplate 2, as at 27. The arm 26 is arranged horizontally straight from itspivot 27 to the part thereof arranged over the key hole slot 21, and isfrom thence inclined upwardly to its connection with the detent 25, asclearly shown in the drawings, the purpose of which arrangement will nowbe described.

A key, indicated by the numeral 28. is

employed for unlocking the door from the exterior of the door upon whichthe lock is arranged or from the side thereof provided with the plate 2.This key has its shank provided with an extending lug or ward 30, whichis of a slightly greater length than the bit 29 of the key. The ward 30is arranged at an angle with relation to the bit 2), but the key holeopening is of a size to admit of the insertion of both the bit and ward.The key, after being inserted I through the key hole opening, is turnedin an unlocking direction. The ward 30 will first contact with thestraight portion of the arm 26 raising the detent out of the slot 24 andpermitting the bit of the key entering the notch of the lug 20 and tocontact with the inner finger 20 provided by the said notch to slide thedogging bolt away from the locking bolt to permit of either of the knobsbeing operated to actuate the projecting lever T to cause the withdrawalor inward movement of the locking bolt 4. \Vhen the dogging bolt hasbeen moved, by the bit of the key, the proper distance, the weighteddetent 25 will have been released by the ward 30 of the key,

permitting the engaging member or tongue.

bit of the key moving in the notch without contacting with the finger20" until after the ward 30 engages with the arm 26 of the detent toraise the same out of the notch 23, and to permit the same to drop bygravity in the notch 24; when the dogging bolt has been moved to saidlocking position.

In order to screen or obstruct the key hole 21 and permit of the lockingbolt being unlocked only from the interior of the houseI provide a latchdevice illustrated in detail in Fig. 1-1: of the drawings. The latchincludes a shank 31 that finds a bearing in an opening provided in aboss 33 in the inner eseutcheon plate and an opening 33 in the sideplate 3 of the lock casing, and if necessary, the end of the shank maybe received in an opening in the plate 2 of the said lock casing. Theshank is provided With a removable head 32 and the: portion thereofreceived in the lock casing with a bit 36 and a throw arm or ward 37Which is arranged at an angle with relation to the bit. Also the shankis provided with an angularly arranged flat plate 38 that is disposed tocover the outer key hole opening in the block casing when the latch isturned in one direction. The bit 36 is adapted to be re ceived in thenotch of the lug 22 and to contact with one of the fingers 22 when thedogging bolt is to be moved into contacting engagement with the lockingbolt and with the opposite finger 22 when the latch is turned in anopposite direction to slide the dogging bolt out of engagement with thelocking bolt. The distance between the fingers 22 and 2'2 is suflicientto permit of the bit 36 engaging with one of the said fingers to slidethe bolt, irrespective of the position to which thesaid dogging bolt hasbeen moved by the key, and as a consequence the bit of the latch is of agreater length than the bit of the key. The throw arm or ward 37 is of alength to contact with the angular portion or arm 26 of the detent 25 toraise the said detent out of one of the notches of the dogging bolt topermit of the sliding of said dogging bolt by the bit of the latch andto disengage the arm of the said detent to permit of the same again engaging in one of the notches of the dogging bolt after the dogging bolthas been moved the desired distance by the latch. This arrangement ofthe latch is such, it will be noted, as to not interfere with theoperation of the key, when the shield 33 has been moved to uncover thekey hole opening as illustrated in Figs. 3 and 5. The removable head 32is provided with a notch and the boss 33 is provided with a similarnotch 39, and these 'notches are adapted to register when the shield isbrought over the key hole.

opening to indicate to the occupant .of the house that the said openingis closed and that the locking bolt is in locked position.

Having thus described the invention, what I claim is:

1. In a lock having a locking bolt, weighted means for moving the boltin one direction, and means comprising mechanism for actuating theweighted means to mo\e the bolt in a second direction, the lock casinghaving a key hole opening upon one of its sides, and a key having itsbit provided with a' ward adapted to be received in the openin a doggingbolt arranged above the key ho e opening to the rear of the bolt, saidCopies of this patent may be obtained for five cents each, by addressingthe tumbler having its underface provided with spaced notches, one ofwhich being arranged over the key hole opening when the tumbler is movedto contact with the lock, the said dogging bolt having its upper faceprovided with spaced slots, a weighted detent engaged within one of theslots, an arm connected with the detent and pivot-ally secured in the"to the rear of the locking bolt, the lock having an opening for a keyfor actuatingthe dogging bolt, a weighted detent to coengage with thedogging bolt to lock the same in contact with the locking'bolt or out ofsuch contact, said detent including a pivoted arm,

a latch spindle journaled in the lock casing,

a removable head for the spindle, a hit upon the spindle for engagingwith the dogging bolt to actuate the latter, a ward upon the spindle tocontact with the arm of the detent to bring the detent out of engagementwith the dogging bolt when the said dogging bolt is engaged by the bitof the spindle,

and a shield upon the said spindle for closing the keyhole opening whenthe spindle has been turned to move the. dogging bolt into contact withthe lockin bolt.

In testimony whereof I a x my signature in presence of two witnesses.

, LORENZO EVANS. Witnesses:

- CHAS. MONTGOMERY,

J AS. A. BAKER.

commissioner of ratentl,

Washington, D. 0.

